I really got lucky to find this opportunity. Will probably sign up for some lessons at the local range, too, both for safety and shooting form. I grew up with guns (including rifles), but haven’t shot in decades, and I want to do this right
Have you got a .22 or even an air rifle? A few practice sessions with one of those, zero the deer rifle and shoot a few more practice rounds rounds through it and you'd be good to go. As I thought about it , doing those things with your son and maybe running through an online hunter safety course with him would send that message far better than anything else, IMHO.